Derrick-pulley pumping-stand.



No. 663,762. Patented 060.. ll; I906 D. C. JOHNSTON.

DERRICK PULLEY PUMPING STAND.

Ap umion filed July '25. 1900.

(No Model.)

W TNESSES: I M444 M"Y W" Attorney Unis Sn'rns ATET DAVID C. JOHNSTON, OFMARIETTA, OHIO.

DERRICK-PULLEY PUMPING-STAN D.

SPECIFICATION forming part of Letters Patent No, 663,? 62, datedDecember 1 1, 1900.

Application filed July 23, 1900. Serial No. 24,522. KN m el-l tion ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to new and useful improvements in derrick-pulleypu mping-stands for use in connection with a pump and clesigned to beaffixed to the tubing, casing, or casing-head. It comprises a pair ofclamps so constructed as to be secured rigidly to the tubing, casing, orcasing-head through which fiuid is to be pumped, and no other support isrequired. Supported by these clamps are the posts or timbers, whichconverge toward each other at their upper ends, where they are connectedby a bolt that serves as the axis or shaft, upon which is designed to revolve a loose pulley, over which the chain or rope attached to the topof the pump-rod passes, being attached at its other end to the power rodor line. When the power is applied, the pump-rod will be lifted andlowered without pinching or binding in the stuffing-box and with aminimum of friction, thus effecting a great saving in power and wear ofthe parts and wasting of oil and other fluids. In action, the power-linelifts the rod without binding or pinching, and gravitation lowers thesame.

The device is simple, quickly and easily applied, and in practice hasbeen found to be most efficient for the purposes for which it isdesigned.

Otherobjects and ad vantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the let ters of reference marked thereon, form part of. thisspecification, and in which- Figure 1 is a perspective view of mydevice. Fig. 2 is an enlarged sectional view taken through the pulleyat. the top of the uprights. Fig. 3 is an enlarged detail view of theclamps with portions broken away and parts shown in section. Fig. 4 is adetail.

Like letters of reference indicate like parts throughout the severalviews in which they appear.

Referring now to the details of the drawings by letter, A designates thetubing or casing of the pump, beneath the collar a of which the clampsare seou red. These clamps B B are each provided with a substantiallysemicircular central portion b, which when united are designed totightly embrace the tubing. Beyond the semicircular port-ion each clampis provided with'a straight portion a, through which are designed topass the bolts O, which serve to clamp the clamps tightly and snuglyaround the tubing, as seen in Fig. 1. Beyond these straight portions theclamps diverge to form the arms D, the outer ends of which are bentsubstantially parallel with each other, as seen at d, and in theseparallel portions are held the rods E, upon which are sleeved the lowerends of the posts or uprights F, there being two upon each end of theclamps-that is, two sleeved upon each of the rods E--and these postsincline inward toward a vertical line and are there joined by the boltG, the ends of the four posts being brought into alinement and the rodpassed through them alland provided upon its ends with nuts g, by whichthe parts are secured and tightened when necessary. The ends of the rodsE are likewise provided with nuts, as seen at e in Fig. 1.

H is a pulley, or it may be a sprocket-wheel, if desired, over which isdesigned to be passed a rope or chain 071, intended to be connected withthe source of power. This pulley has a central hub h of greater diameterthan the rod, as seen in Fig. 2, and ball-bearing may be provided, ifdesired. The rods or uprights F may be joined by the brace-rods I, ifnecessary.

The clamps may be of the form shown in Figs. 1 and 3, or they may insome instances be provided with a hinge in lieu of one of the bolts C;but as this is a well-known form of clamp it is not thought necessary toherein illustrate it.

In practice the clamps are secured about the tubing, being first putabout the same loosely and then the bolts O and nuts tightened until theclamps grip the tubing solidly beneath the shoulder of the collar, whenthey will be immovable. The incline of the posts makes a strong form ofsupport, and the pulley being in vertical line with the pump-rod thelatter is reciprocated Without strain or binding, and less power is thusrequired. Besides there is practically no wear and but little, if any,friction.

It will thus be seen that I have produced a simple, cheap, yet strongand durable pul stand is affixed.

2. A pulley pumping-stand comprising inclined posts, a pulley mounted inthe upper ends of said posts, and a clamp connected with said posts andadapted to be connected with a tubing forming the barrel of the pump towhich said stand is affixed.

3. Adevice of the characterdescribed, comprising inclined posts, a shaftsupported in the united ends of said posts, a pulley on said shaft,acable operating on said pulley, clamps connected with said posts andadapted to be connected with the tubing forming the barrel of the pumpto which said stand is affixed, said cable being adapted to operate alift-rod in said tubing, as set forth.

4. In a pulley pumping-stand, a clamp consisting of two sections, eachhaving an arm at each end adapted to be mounted on the said stand and anintermediate portion adapted to embrace the tubing forming thepumpbarrel to which said stand is affixed, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID c. JOHNSTON.

Witnesses:

D. R. R001),

E. C. MEUNIER.

